Wednesday September 10 2025 Forecast (7:11AM)

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DAYS 1-5 (SEPTEMBER 10-14)

Offshore low pressure blankets our region with clouds today, but only delivers very limited wet weather. Most of the rain will fall on Nantucket and Outer Cape Cod, with just a few waves of dissipating showers trying to get further west and north, but mostly unsuccessfully. There can also be a few patches of drizzle from some lower level moisture with an onshore flow. The low pulls away tonight and a clearing trend begins, and other than some lingering clouds in eastern areas early Thursday, our bright September weather returns, with a nice response by our temperature with the return of sun and a ridge of high pressure sitting atop our region. Friday, a cold front slides across the area cooling us back down again, but with continued fair weather, which lasts into the weekend. However, later in the weekend we see more clouds in responsible to the approach of an upper level low pressure system, and it may present our next shower threat as early as the end of the day or evening on Sunday if timing is quick enough.

TODAY: Cloudy. Periods of light rain most likely South Coast / Cape Cod and less likely but still possible elsewhere, along with drizzle patches. Highs 63-70. Wind E to NE 5-15 MPH except 15-25 MPH Outer Cape Cod.

TONIGHT: Cloudy south and east with a little light rain or drizzle early, and breaking/thinning clouds to the west and north. Patchy fog. Lows 46-53. Wind NE to N 5-15 MPH Cape Cod, under 10 MPH elsewhere.

THURSDAY: Early clouds linger in eastern area, otherwise mostly sunny. Highs 74-81 but a little cooler some coastal areas. Wind N up to 10 MPH but some coastal sea breezes.

THURSDAY NIGHT: Mostly clear. Fog patches possible in low elevation locations. Wind variable under 10 MPH.

FRIDAY: Mostly sunny. Highs 68-75. Wind NW up to 10 MPH.

FRIDAY NIGHT: Mostly clear. Fog patches possible in low elevation locations. Lows 43-50. Wind variable under 10 MPH.

SATURDAY: Mostly sunny. Highs 68-75, coolest in coastal areas. Wind variable up to 10 MPH with coastal sea breezes.

SATURDAY NIGHT: Mostly clear. Fog patches in low elevations once again. Lows 42-49. Wind variable under 10 MPH.

SUNDAY: Sunny morning. Some clouds arrive in the afternoon. Potential for showers evening or night. Highs 67-74. Wind variable 5-15 MPH.

DAYS 6-10 (SEPTEMBER 15-19)

Upper level low pressure brings the chance of some unsettled weather to start next week before we see fair weather return. Temperatures below normal to start, recovering to near to above normal as the week goes on.

DAYS 11-15 (SEPTEMBER 20-24)

The overall pattern continues to look on the dry side with high pressure in general control. A couple fronts from Canada add to an up and down temperature regime. Any shower activity with frontal passages should be brief.

58 thoughts on “Wednesday September 10 2025 Forecast (7:11AM)”

  1. Good morning and thank youvTK

    57 here this morning.

    Do you think it is now safe to remove the window air conditioners? Thinking of starting that today.

    Thank you.

      1. Awesome!
        I wasn’t even sure it was a word, but it fit, so I went with it.
        Didn’t have too many clues with my first 2 words, but just enough. 🙂
        Getting to like this game better. Getting a better feel for it and I am being more tenacious.

        1. Nice job, JpDave! Took me 4 today. Like you, I also didn’t know whether it was a word. It was all I could think of.

          1. yes, indeed. Feels good to get the word and the earlier the better. Good brain exercise, especially good at my age. 🙂

        3. Awesome. Glad you are enjoying. 3 for me too. I was about to put it aside till morning; and like you, the word just popped into my head.

    1. Yikes. I don’t know how often this occurs or the reason it would. Maybe it’s just something we see on occasion??

      1. Extremely rare. From Michael Lowry:

        “It’s the first time since 2016 we’ve had no active systems anywhere in the Atlantic basin on September 10th and only the 4th time this century we’ve recorded a September 10th shutout.

        Since the modern satellite record began in 1966, roughly 3 in 4 years have observed a named storm somewhere in the Atlantic, Caribbean, or Gulf on September 10th. We’ve had as many as 3 simultaneous named storms on September 10th in years like 2018, 2011, and 2005. Going back even further, 1961 observed 4 concurrent named storms (Betsy, Carla, Debbie, and Ester) on September 10th – 3 of them hurricanes – still the most named storms and hurricanes of any hurricane season at its peak in the 175-year record book.

        As we mentioned in Tuesday’s newsletter, what makes this season especially unusual is the absence of any tropical activity in the two weeks leading up to the September 10th peak, a feat that’s only been recorded twice in the modern satellite record (1992 and 1968).”

  10. a single tornado that lifts and then touches down again. In such events, the National Weather Service determines if they are separate tornadoes based on the distance between touchdowns (typically more than 2 miles) or if they are part of a longer, continuous path.

    Continuing to research. This further validates that its 5 separate tornadoes.

    1. I definitely learned here.

      Always thought if it were the same cell and more importantly, same rotation that touched down, then lifted, then touched down, etc, it was 1.

      I now understand, but I don’t care for this interpretation. I think if its the same cell and the rotation never ceases, but the tornado itself is on the ground, then lifts, then on the ground, etc, it should be 1. But, that’s not the way it is.

      I hear 5 tornadoes and I think of an outbreak with 5 different cells on 5 different tracks. I think the above interpretation by the NWS can be misleading.

      1. To further differentiate ….

        we try to see those couplets on the radar, where the green’s and red’s come close together.

        On this cell, I am operating on the impression it was the same couplet the whole time, that tightened, then weakened, then tightened, etc.

        Now, if it was the same cell with a couplet that had a tornado touchdown and then that couplet/rotation completed stopped and then, in the same cell, a completely different couplet developed and from that, a tornado made it to the ground, well then, that, I would propose is multiple different tornadoes.

        In hindsight, I was at the campground Saturday without access to a dopplar, but I was under the impression it was the same one couplet that tightened, then weakened, etc.

        Sorry, I find the topic really neat and one I had never given much thought to, so that is why I am carrying on and on and on about it.

        1. Fascinating Tom. Thanks for further info. I’ll read your posts a few times to completely understand. I think…not positive..,,the nws review mentioned weakening and strengthening. I’ll reread it

  13. Thanks, TK:

    Tornadoes: With much improved technology and knowledge that we have now, it’s wonderful that we can classify tornadoes. I wonder how many storms in the past were classified as tornadoes but were, in fact, straight-line winds or just severe thunderstorms. I grew up in Mansfield MA and you can read the digitized archives of the local weekly newspaper. Sometimes, in the 1940s and 50s, the paper reported that a tornado had caused damage in a certain section of Mansfield. But this was based on eyewitness reports or from the local police or fire. It may or may not have been a tornado.

    West Mansfield and South Foxborough did get hit with one of the tornadoes from the June, 1953 outbreak at the end of its trek.

  14. Tom:

    Thanks for your note on Monday!

    I am off to a great retirement. It is really strange. I truly miss interacting with the students. Being home and not in the classroom in September is taking some getting used to.

    I did, however, watch the entire Sunday Night Football game between the Bills and the Ravens. It was great knowing that I didn’t have to get up at 5:30! 🙂

    1. I’m glad things are going great !

      I’m envious staying up late for that Ravens/Bills game, especially given what happened at the end.

  15. JpDave …… its more than 8 days out and its the GFS, but I wonder if you might want to keep 1 AC in the window for a bit yet.

    https://www.pivotalweather.com/model.php?m=gfs&p=sfct-imp&rh=2025091012&fh=201&r=us_ne&dpdt=&mc=

    The Euro and GDPS dont support this, but I can find other times in their runs where the simulate the potential for another very warm day.

    https://www.pivotalweather.com/model.php?m=ecmwf_full&p=850th&rh=2025091000&fh=330&r=conus&dpdt=&mc=

    Its been below avg temps, save for last Saturday for so long, I can’t imagine, say before mid October, the atmosphere might re-arrange one more time, such to offer up a day that is very warm and humid.

    1. Rare that you aren’t in the twos and threes. Awesome to get it. It fits me so was a bit easier 🙂 🙂 🙂

  19. The Red Sox have given up runs for the first time since Sunday! 😉
    But they are tied 2-2 in the 3rd inning, and have the best record in the league in games played before sunset, so that’s on their side. 😉

  20. BTW, today’s forecast for N & W of Boston was pretty bad. I did not go for “partly sunny”. 🙂

      1. Haha! Well in most cases missing it this way is better than telling people mostly sunny and having virtually no sun. 🙂

    1. In a few more days, since aphelion on July 3rd, the earth will have moved 1,000,000 miles closer to the sun, having gone from 94,503,000 miles away to 93,503,000 miles away.

      Of course, the lost of nearly 20 degrees of sun angle and close to 3 hrs per day of sunlight way more than offset being a million miles closer.

      2.1 million more miles closer yet to go until perihelion just after New Year’s Day.

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